Advanced Oncotherapy plc, together with its subsidiaries, engages in the designing, assembling, and selling proton-based radiotherapy systems for treatment of cancer. It is developing Linac Image Guided Hadron Technology, a proton therapy system for treating cancer. The company also engages in the management of healthcare related properties.

It has operations in the United Kingdom, Switzerland, and the United States. The company was formerly known as CareCapital Group plc and changed its name to Advanced Oncotherapy PLC in September 2012. Advanced Oncotherapy plc was founded in 1994 and is headquartered in London, the United Kingdom.